https://phys.org/news/2018-09-nasa-tropical-depression-joyce.html

At 8:55 a.m. EDT (1205 UTC) the Moderate Resolution Imaging Spectroradiometer or MODIS instrument aboard Aqua captured a visible image of Joyce. Drier air is moving into the depression causing it to lose organization. The dry air is sapping the storm's ability to form the thunderstorms that make up a tropical cyclone. Visible satellite imagery shows a few cloud swirls pivoting around a mean center with only a small amount of strongest thunderstorms displaced about 90 miles northeast of the mean center.

At 11 a.m. EDT (1500 UTC) on Sept. 17, the center of Tropical Depression Joyce was located near latitude 34.0 degrees north and longitude 28.4 degrees west. That's 280 miles (465 km) south-southwest of the Azores Islands.